Pipe-coupling



'(No Model.) o

P. BARNHART. PIPE GOUPLING.

Patented Oct. 26, 1897.

W Imidi? UNITED STATEST PATENT FFICE.

i J FRANK BARNHART, OF WARREN, PENNSYLVANIA.:

PlPE-COUPLING.

SPECIFIGATION forming' part of Letters Ifatent No. 592,681, datedOctober 26 1897. Application filed January 28, 1897. Serial No. 621,097.(No model.)

To all wiz/0m it may con/0877?,.- v p Be it known that I, FRANKBARNHART, a citizen of the United States, residing at Warren, in thecounty of Warren and State of' Pennsylvania, have invented new anduseful Improvements in Pipe-'Oouplings, of which the following isa-spe'cification. w My inveution relates to certain improvements inuniversal ball-joint flange-couplings for pipes, mypurpose being toprovide a coup1 ling of this ty-pewhich can be manufactured at a muchlower cost tha'n those now in common use, its simplicity of constructionbeing increased to a marked degree and the numl ber of parts of which itis composed diminished, whereby it can be detached orattached moreeasily and-quickly than heretofore and requires a less degree ofmechanical skill for this purpose.

It is a further object of my invention to provide such a pipe-couplingwith a novel construction whereby the joint can be made at any anglepermitted by the proj ectin g fianges and at any such angle will packitself without rcquiring any especial adj ustments of the intermediatemetallic packing-ring, which is interposed between the unfinished conveXand concave faces of the coupling.

My invention also has a` further purpose,

which is to enable the washers upon whichthe nuts of theconnecting-bolts rest to find their proper level, so that the nuts asthey are turned up will draw squ-arely and in the line of the bolts.

The invention consists, to these end's, in the novel features ofconstruction and new combinations of parts hereinafter fully described,and then particularly pointed out in the claims which conclude thisspecification.

To enable those skilled in the art to which my said invention pertainsto fully understand the same, I will proceed to describe said inventionin detail, and for this purpose reference will be had to theaccompanying drawings, in' which--l Figure 1 is a section taken in theaxial line of the coupling. Fig. 2 is a plan View of the male portion ofthe coupling, showing the unfinished convex face. Fig. 3 is a plan viewshowing the unfinishedconcaveface of the female portion. Fig. et is adetail view of the metallic packing-rin g.

The reference-numeral 1 in said drawings indicates the male portion ofthe coupling, which consists of a disk of suitable diameter andthickness provided with a projecting portion 2, which rises from one ofits fiat faces anfd is c'oncent'ric with the disk. A central openingpasses through both the disk and projection, a female thread beingformed therein .to enable the end of a section-'of pipe 4 to be screwedtherein. The outer face of the part 2 is conveX and constitutes,practically, a surface of ,a sphere included between twoparallel'planes. The parts of the coupling are formed by casting, andthe conveX face last mentioned can be left in the condition in which itcomes from the mold, as it is not necessary to dress this surface offand give it a finish, as has usually been done heretofore. This factenables me to m anufacture the coupling at a considerable-reduction incost. The

unfinished face does not detract from the ap-' when the two members ofthe coupling are' brought-into proper relations. The formation of theconcave recess 6 produces a corresponding projection 7 upon the otherface of the disk, and a central opening 8 is provided, having a femalethread, so that the section of pipe 9 may be attached by screwing itsthrcaded end into said opening.

In uniting the two parts of the coupling a packing-ring 10, formed ofmalleable cast-copper, is laid in the concave recess 6, the diameter ofthe ring' being such that it can lie in said recess at a point betweenthe opening 8 and the face of the disk in which said recess is formed.The male projection 2 is then placed in the packing-ring 10, and theparts are secured by bolts 12, which are inserted through openings inboth members of the coupling. The square heads of the bolts lie againstfiat faces 13, formed by removing por- IOO tions of the projeetion 7next to the bolt-openings. This construction answers all the pu rposesof a bolt-loek, as it eifeetually prevents the bolts from turning ineither direction.

The threaded ends of the bolts 12 pass through openings in the disk 1,which are surrounded byeoneentrie concavities 14:. In these concavitiesare placed washers 15, their seating-faces being` convex to eorrespondwith the concave depressions in which they seat. By this constructionthe washers can have a universal adjustment in their seats, and when thenuts 1G are turned upon the threaded ends Of the bolts 12 until theybearupon the washers 15 with force the latter will readily seek a positionin which the nut will bear uniformly upon its face, and thus exert itsstrain in the longitudinal line of the bolt.

The invention, as will be seen, consists of very few parts, all havinggreat simplicity of construction. It can bemanufactured at a very smallexpense, as I avoid the necessity of dressin g off and finishing the twoadjacent or engaging faces of the two parts composing the eoupling.

That I claim isl. A pipe-eoupling, consisting of two disks havingbolt-holes, one disk formed integral with a central convex projectionhaving a central serew-threaded opening into which the end of one pipeis screwed, and the other disk formed integral with a correspondingcentral eoncavity having a central .screwthreaded opening into which theend of the other pipe is screwed, a inetallic paeking-ring arranged inthe concavity and bearing against the convex projection, andclainping-bolts passing through the bolt-holes of said disks at pointsaround the concavity and concave projection, for drawing the partstogether and compressing the metallic packing-ring, substantially as andfor the purposes described.

2. In a pipe-eoupling the combination with two disks one having a eonvexprojeetion and a section of pipe entering an opening through saidprojection, and the other having a concave recess of greater diameterthan the convex projection and provided with a similar section of pipe,a paeking-ring of malleable cast-eopper arranged between the concave andconvex surfaces, bolts passing through openings in both disks, theopenings around the threaded ends being surrounded by concentricconeavities, washers having convex faces to seat in said concavities,and nuts turned on the bolts and against said washers, substantially asdescribed.

3. In a pipe-eoupling the combination with two seetions of pipe of diskson the ends of said pipcs, one of said disks havingaconvex projectionand the other disk having a concave recess of greater diameter, alnetallic packing-ring interposed between the eoncave and eonvexsurfaces bolts inserted through openings in said disks, their angularheads lying close to flat faces in a projection on one disk to preventturning, washers having eonvex faces seated in concentrie eoncavitiessurrounding the openings that receive the threaded ends of the bolts,and nuts turned on the latter, snbstantially as deseribed.

In testimony whcreof I have hereunto set my hand in presence of twosubscribing witnesses.

` FRANK BARNIIART.

Titnessesz O. E. BonDwnLL, D. I. BALL.

